XX. General Concepts

Question 1

zones of increased content of chemical elements in natural formations associated with deposits of useful minerals

Answer 1

Halos of Dispersion

Question 2

zones enriched in certain chemical elements that form around an ore body due to geological and geochemical processe

Answer 2

Halos of Dispersion

Question 3

Forms at the same time as the ore deposit.
Develops in the host rock due to hydrothermal or magmatic activity.

Answer 3

Primary Halo (surrounding the ore body)

Question 3

The source of useful minerals like gold, copper, etc.

Answer 3

Ore Body (center)

Question 4

Arise in the surrounding rock simultaneously with the formation of the mineral body.

Answer 4

Primary Halo (surrounding the ore body)

Question 5

Indicates the movement of chemical elements from the ore body to the surrounding environment.

Answer 5

Dispersion of Elements

Question 6

Forms after the ore body due to weathering and surface processes (supergene processes).
Found in soil, water, plants, and air.
Form in the products of decomposition of rock, and also in soil, water, plants, and the surface atmosphere.

Answer 6

Secondary Dispersion Halo

Question 7

Types of Secondary Halos:

Answer 7

(1) Mechanical Halos
(2) Saline Halos
(3) Gaseous Halos
(4) Biogeochemical Halos

Question 8

particles physically transported (e.g., by wind or water)

Answer 8

Mechanical Halos

Question 9

elements dissolved and moved in water

Answer 9

Saline Halos

Question 10

elements moved as gases (like radon)

Answer 10

Gaseous Halos

Question 11

elements absorbed by plants or microbes

Answer 11

Biogeochemical Halos